The complete set of test equipment for KDCJ-1800kV/180kJ impulse voltage generator is suitable for the following specific test scenarios:
1. High voltage insulator impact withstand voltage test
Conduct lightning impulse full wave (1.2/50 μ s) and operational impulse (250/2500 μ s) withstand tests on ceramic insulators, composite insulators, etc. to verify their insulation performance under overvoltage, in compliance with JB/T 7616 and DL/T 557 standards.
2. Impact test for bushings (such as transformer bushings and wall bushings)
Simulate the impact of lightning or overvoltage on the external insulation and internal structure of the casing, and evaluate whether flashover or breakdown will occur.
3. Impulse test of current/voltage transformers
According to the requirements of GB/T 7449, conduct lightning impulse test on the transformer to verify the reliability of its main insulation and inter turn insulation.
4. Type testing of power transformers and reactors
During the research and development or manufacturing stage, conduct lightning impulse tests on large transformers to verify the insulation strength of windings to ground and between phases.
5. Verification of GIS (gas insulated switchgear) and high-voltage switch components
Perform impulse voltage tests on insulation supports, isolation fractures, and other components in GIS to ensure safe operation under extreme overvoltage conditions.
6. Standard tests of scientific research and certification testing institutions
Used for conducting authoritative testing in high-voltage laboratories that comply with national standards such as GB/T 16927 and GB/T 311, supporting product type testing, sampling, or international certification (such as IEC benchmarking).
✅ This equipment is particularly suitable for use in indoor high-voltage testing halls, and can operate continuously to meet the full chain high-voltage testing needs from product development, factory quality inspection to third-party certification.
The PD Patrol Tester is suitable for the following typical application scenarios and environments:
Substation and distribution room
Conduct live patrol inspection on switch cabinet and GIS composite apparatus in operation without power failure.
Power maintenance and operation&maintenance site
It is used for periodic partial discharge detection of transformer, cable terminal, busbar and other equipment, so as to discover potential insulation hazards in time.
Power equipment manufacturer
The high voltage equipment shall be subject to partial discharge test before delivery to ensure that the product quality meets the standards.
Rail transit and industrial plant area
Detect partial discharge in traction substation and HV distribution system to ensure power supply safety.
Laboratory and Testing Agency
Carry out partial discharge mechanism research, equipment performance verification or third-party inspection and certification.
✅ The equipment can work stably in the conventional industrial or outdoor environment of - 20 ℃ - 50 ℃ and humidity of 10% - 90% (non-condensing). It is light and portable (only 0.85kg) and suitable for mobile inspection and on-site fast diagnosis.
This product is applicable to power system, high and low voltage switchgear, electrical equipment manufacturing, rail transit, new energy power station and other industrial scenes. It can conduct high-precision contact resistance detection for switches, circuit breakers, cable joints, welding seams, etc. in the normal workshop or site environment with - 10 ℃ - 40 ℃ and humidity<80% RH.
KDSL-82-500A short-time overcurrent tester is applicable to various power and industrial site environments, mainly including:
Substation and power distribution room: used for transformation ratio and polarity verification after installation of current transformer (CT) and short-time overcurrent test of relay protection device;
Power construction and maintenance site: quickly verify CT performance before equipment is put into operation or during maintenance to ensure accurate and reliable protection system;
Electrical equipment manufacturer and laboratory: carry out ex-factory test, metering verification or R&D test of transformer;
Railway, petrochemical, metallurgical, mining and other enterprise owned power stations: used for regular detection and troubleshooting of internal power supply and distribution systems.
The equipment conforms to GB6587.1-86 Group III standard, and can operate stably in indoor and outdoor environment of - 10 ℃ -+50 ℃, humidity ≤ 90% (non-condensing) and altitude below 1500m. It supports AC 220V single-phase power supply and is compact and easy to carry. It is especially suitable for mobile operation and site use with limited space.
KDSL-82-500A short-time overcurrent tester is applicable to various industrial and power field environments, and its main applications include:
Substation and power supply station: used for transformation ratio and polarity verification of current transformer (CT) and short-time overcurrent test of primary bus protection device;
Power engineering and commissioning site: quickly verify CT installation quality in new or reconstructed projects to ensure accurate action of relay protection system;
Manufacturer of electrical equipment: function and accuracy test shall be carried out before ex-factory of transformer, switch cabinet, protection device and other products;
Railway, petrochemical, metallurgical, mining and other industrial and mining enterprises: used for maintenance and overhaul of their own power distribution systems to ensure reliable protection of key equipment under fault current;
Measurement and testing and the third party laboratory: carry out high-accuracy current comparison, transformer verification and other standardized tests.
The equipment conforms to GB6587.1-86 Group III instrument standard, and can work stably in indoor and outdoor environment with temperature of - 10 ℃ -+50 ℃, humidity ≤ 90% (non-condensation) and altitude below 1500m. Integrated structure design, light and portable, support AC 220V single-phase power supply, without complex auxiliary equipment, especially suitable for space limited or mobile operation scenes, is an ideal tool for efficient, safe and accurate on-site electrical test.
KDSL-S500A three-phase large current generator is applicable to a variety of power and industrial test scenarios, and its main application environments include:
Low-voltage complete switchgear manufacturer: used for temperature rise test and type test of GCK, MNS, GGD and other switchgear, meeting the requirements of GB 7251.1-5 standards;
Power system operation&maintenance and inspection center: conduct verification and function test on circuit breaker, thermal relay, contactor and other protection devices in substation, power supply station or maintenance base;
Electrical laboratory and quality inspection organization: carry out type test, ex-factory inspection and third-party certification test of electrical products, and support long-term stable output;
Project commissioning site: it can be deployed in the power distribution room, power plant or construction site, and the installed equipment shall be subject to power-on verification and protection characteristics verification;
University and scientific research unit: used for teaching demonstration or research on thermal effect and current-carrying capacity of electrical equipment.
The working environment of the equipment is wide (- 10 ℃ -+50 ℃, humidity ≤ 90% non-condensation, altitude ≤ 1500 m), with IP20 protection grade and forced air cooling system, which can operate stably for a long time in the normal indoor industrial environment, and also suitable for temporary outdoor operation. Its high-precision, strong anti-jamming capability and full-automatic control characteristics ensure that the high-current test task can still be completed safely and efficiently in a complex electromagnetic environment.
Introduction to Application Environment of KDSL-S500A Three-phase Large Current Generator (simplified version)
KDSL-S500A three-phase large current generator is applicable to the site and laboratory environment of power system, industrial and mining enterprises, electrical equipment manufacturing and testing units, and is mainly used for power-on verification and overload/short circuit characteristic test of thermal relay, motor protector, circuit breaker, contactor, switch cabinet, protection panel and other equipment.
The equipment conforms to GB6587.1-86 Group III instrument standard, can operate stably in indoor or outdoor conventional environment, and adapt to substation, distribution room, maintenance workshop, commissioning site and other working conditions. It is small in size, light in weight, strong in anti-jamming capability, supports AC 380V/220V three-phase four-wire power supply, outputs 0~500A continuously adjustable standard sine wave large current, meets the test requirements of high accuracy (0.5 level) and high stability (current stability of 0.5%), and is an ideal tool for verification and function verification of electrical protection devices.
Application of ball gap gauge:
When conducting the experiment, connect the ball gap device in parallel with the test sample. The ball gap device itself has a protective resistor of 1 ohm per volt in series. First, adjust the ball gap to 60% of the test voltage (the discharge distance of the ball gap can be checked from the ball gap discharge voltmeter below, Tables 1 and 2). At this time, the test sample should be connected simultaneously. Measure the readings of the test transformer and low-voltage side voltmeter when the ball gap is discharged (take the average of 3-4 times), and then measure the readings of the voltmeter at 70% and 80% of the test voltage in the same way. Use this three-point line value as a curve (mostly a straight line), and then extend this curve (mostly calculated proportionally) to a position 10-15% higher than the required test voltage, as a discharge protection against overvoltage that may occur during the withstand voltage test process.
Application environment of KD2675 series AC/DC withstand voltage insulation analyzer
1. Typical application scenarios
The instrument integrates functions such as AC withstand voltage, DC withstand voltage, insulation resistance, and arc detection, and is mainly used in fields that require electrical safety performance testing. Typical scenarios include:
Electronic product manufacturing: voltage/insulation testing of production lines for household appliances, 3C equipment, etc. before leaving the factory;
Medical equipment research and development: safety testing in accordance with standards such as IEC60601 (such as medical instrument quality inspection);
Electrical component quality inspection: incoming inspection and safety certification of suppliers such as cables and circuit boards;
Third party testing institutions: laboratory testing processes for safety certifications such as 3C and CE.
2. Environmental condition requirements
Combining the "installation location" and "usage environment" in the product specifications, the following physical environmental constraints must be met:
Space: Indoor use, altitude ≤ 2000 meters (high-altitude air pressure changes may affect electrical performance stability);
Temperature: 0~40 ℃ (to ensure that the internal components of the equipment work normally within the temperature rise range);
Humidity: The relative humidity at 40 ℃ is 20-90% RH (to avoid insulation failure or electrostatic interference caused by humidity).
3. Adapt to scene characteristics
Automated testing requirements: Supports RS232, PLC/ANDLER interfaces, can be connected to automated production line systems, and achieve efficient batch testing;
High precision R&D/certification scenarios: waveform distortion<2% (resistive load), current measurement resolution up to 0.001mA (AC)/0.1 μ A (DC), meeting the precision testing needs of R&D laboratories and certification agencies;
Areas with high safety requirements: uS level leakage protection response, anti electric shock design, suitable for scenarios such as medical equipment and power systems that require strict testing safety and reliability.
4. Limiting Scenarios
Extreme environments (such as high temperature>40 ℃, high humidity>90% RH, high altitude>2000 meters) may affect testing accuracy or equipment lifespan;
Outdoor direct exposure scenarios (susceptible to dust and moisture interference without protective measures).
The KDGK-II high and low voltage switchgear power on test bench is suitable for the production environment of high and low voltage switchgear manufacturers and is used for power on testing before the switchgear leaves the factory. This device requires a three-phase four wire AC 380V power supply as input and is suitable for testing resistive and inductive loads. The equipment adopts a three-phase rectification module input without phase sequence restrictions. The triggering circuit system, thyristor, and thermal conductive substrate are insulated and isolated from each other, with a dielectric strength greater than 2500V, ensuring safe use. The external dimensions of the equipment are 700 × 600 × 1100mm, suitable for use in dry, non corrosive gas production environments.
The Partial Discharge Detector is designed for use in a wide range of power system environments, including:
Manufacturing plants – for quality control of transformers, cables, and switchgear.
Power substations – for on-site commissioning and routine maintenance.
Transmission & distribution networks – for condition assessment of high-voltage equipment.
Industrial facilities – for predictive maintenance of critical electrical assets.
Laboratories – for R&D and type testing of insulation systems.
Operates reliably in temperatures from -10°C to +40°C and humidity ≤80% RH, making it suitable for both indoor and field applications.
The KDYD-2845kV Intelligent Turn-to-Turn Withstand Voltage Tester is primarily used in industrial environments with strict requirements for electrical insulation performance and large-scale production or maintenance. Its typical application settings have the following characteristics:
Motor and Transformer Manufacturing Workshops/Production Lines: This is the primary application scenario. The instrument is integrated into the final stage of production lines for motors (especially medium and large AC/DC motors) and transformers, serving as a mandatory safety inspection before delivery. On the production line, operators use its "one-button test" and automatic judgment features to perform rapid and efficient turn-to-turn insulation tests on every finished product, ensuring no critical defects like inter-turn short circuits are present before shipment.
Large Equipment Maintenance and Repair Shops: In power plants, heavy machinery factories, or specialized motor repair centers, the instrument is used to verify the condition of motors, generators, and large transformers undergoing repair or overhaul. By comparing the test waveforms with original standard waveforms or those from normally functioning units of the same model, technicians can accurately determine whether the windings were damaged during repair and if the turn-to-turn insulation has been restored to good condition.
Research and Quality Inspection Laboratories: In university, research institute, or third-party testing laboratories, the instrument is used for insulation performance research on new materials and processes, as well as for type testing of products. Its high output voltage of up to 45kV and precise waveform analysis capabilities allow it to simulate extreme operating conditions, providing critical data for evaluating the dielectric limits of new insulating materials and verifying the reliability of product designs.
Environmental Requirements: Due to its large size (180kg cabinet-type unit) and equipped with casters, the instrument is typically placed in a spacious, indoor environment with a level floor. According to the documentation, its normal operating temperature range is 0–40°C, with relative humidity not exceeding 80% at 40°C. Therefore, it should be avoided in harsh environments that are damp, dusty, or subject to drastic temperature changes to ensure test accuracy and equipment longevity. Its sloped display and ergonomic layout also require adequate lighting and workspace in the operating area.
In summary, the KDYD-2845kV Intelligent Turn-to-Turn Withstand Voltage Tester serves three major fields: industrial manufacturing, equipment maintenance, and scientific research/testing. Its application environment emphasizes safety, standardization, and rigorous quality control.
The KDYDJ-6kVA/100kV Series Resonant Power Frequency Withstand Voltage Test Set, comprising its compact control box and lightweight oil-immersed test transformer, is ideally suited for on-site preventive maintenance and acceptance testing of medium-voltage electrical equipment in power distribution networks.
A typical scenario involves a team from a municipal power supply company conducting routine insulation checks on newly installed or repaired equipment at a 10kV substation. The technicians need to verify the integrity of components such as:
In this field environment, the test set's features are crucial:
By applying the specified high voltage (e.g., 42kV for a 10kV system) for a duration like 1 minute, engineers can assess the insulation level, identify any potential defects (such as cracks or moisture ingress), and ensure the equipment meets safety standards before being energized, thereby guaranteeing the reliability and safety of the power grid. The device's portability, ease of use, and reliable performance make it an essential tool for such field applications.
Here is the **English translation** of the practical application scenarios for **PD-Free Testing (Partial Discharge-Free Testing)**:
1. Factory Testing of Power Transformers/Reactors**
- **Purpose**: Verify the insulation performance of high-voltage transformers/reactors under rated voltage to ensure no insulation degradation caused by partial discharge (PD).
- **Scenarios**:
- Insulation strength testing between transformer windings and core.
- Detecting internal voids, oil-paper insulation defects (e.g., moisture, impurities).
- Insulation system verification for UHV (Ultra High Voltage) transformers (e.g., ±800 kV DC transformers).
2. Insulation Testing of High-Voltage Cables and Accessories**
- **Purpose**: Ensure cable joints, terminations, and other accessories are free from PD-induced breakdown risks during long-term operation.
- **Scenarios**:
- Acceptance testing after cable installation (e.g., underground cables, submarine cables).
- Detecting micro-pores, mechanical damage, or uneven semi-conductive layers in cable insulation.
- Voltage ratings: 10 kV–500 kV, especially for cross-linked polyethylene (XLPE) cable systems.
3. GIS (Gas-Insulated Switchgear) and Circuit Breaker Testing**
- **Purpose**: Validate the SF6 gas insulation performance of GIS to avoid failures caused by PD.
- **Scenarios**:
- Insulation testing of GIS busbars, disconnectors, and earthing switches.
- Detecting metal particles, insulator cracks, or assembly errors causing discharge.
- Applicable to transmission systems of 110 kV and above.
4. Insulation Verification for Renewable Energy Equipment**
- **Purpose**: Ensure insulation reliability of wind power/photovoltaic equipment (e.g., wind turbines, inverters, pad-mounted substations) in harsh environments.
- **Scenarios**:
- Humidity-resistant insulation testing for offshore wind farm step-up transformers.
- Analyzing discharge characteristics of PV inverter high-voltage insulation materials.
- Detecting insulation stress issues caused by frequent switching or harmonics.
5. Traction Power Supply System Testing for Electrified Railways**
- **Purpose**: Guarantee safe operation of traction transformers and catenary insulators under high load.
- **Scenarios**:
- PD detection in traction transformers under 25 kV AC power supply.
- Insulation performance verification of catenary insulators in high-humidity/dusty environments.
- Preventing traction system tripping or train shutdowns due to discharge.
6. Research and Development of New Insulation Materials**
- **Purpose**: Evaluate discharge characteristics of novel insulation materials (e.g., nano-composites, eco-friendly gases).
- **Scenarios**:
- Laboratory simulation of PD thresholds under extreme voltages.
- Comparing traditional epoxy resins with new eco-friendly insulation materials.
- Providing test data for revisions of IEEE, IEC, and other international standards.
**7. Preventive Maintenance of Power Equipment**
- **Purpose**: Regularly inspect insulation conditions of operational equipment to identify latent defects.
- **Scenarios**:
- Annual insulation testing of substation transformers and capacitors.
- Detecting insulation aging (e.g., oil-paper carbonization) in aging equipment.
- Preventive replacement of high-risk equipment to reduce unplanned outages.
**8. HVDC (High-Voltage Direct Current) System Testing**
- **Purpose**: Ensure insulation stability of DC cables and converter transformers under continuous DC voltage.
- **Scenarios**:
- Long-term PD analysis of ±500 kV/±800 kV DC cables.
- Performance verification of valve hall insulators in high-altitude or polluted environments.
- Addressing space charge accumulation issues in DC electric fields causing PD.
**9. Aerospace and Military Equipment Testing**
- **Purpose**: Ensure fail-safe insulation for electrical equipment in high-reliability scenarios.
- **Scenarios**:
- PD detection in aircraft high-voltage distribution system insulation materials.
- Anti-extreme-environment insulation testing for military radars and shipboard power systems.
- Insulation life assessment of nuclear plant safety-grade transformers.
